Automatic transmission with configurable dynamic turbine damper

Patent metadata

Field	Value
Publication number	US-9488262-B2
Application number	US-201414560510-A
Country	US
Kind code	B2
Filing date	Dec 4, 2014
Priority date	Dec 4, 2014
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A transmission includes a torque converter including a pump and a turbine, and an input hub. A pump lock-up clutch selectively connects the pump and the input hub for directly communicating torque therebetween when the lock-up clutch is engaged. A first pump damper interconnects the pump lock-up clutch and the input hub for damping torsional vibration between the pump and the input hub when the pump-lock up clutch is engaged. A turbine damper interconnects the turbine and either the pump or the input hub. The turbine damper is operable to dampen torsional vibration between the turbine and ether the pump or the input hub when the pump lock-up clutch is engaged. A turbine lock-up clutch selectively connects the turbine and either the input hub or the pump for directly communicating torque between the turbine and the one of either the input hub or the pump.

First claim

The invention claimed is:

1. A transmission comprising:
a torque converter including a pump and a turbine;
an input hub;
a pump lock-up clutch selectively connecting the pump and the input hub for directly communicating torque therebetween, wherein the pump lock-up clutch is moveable between an engaged position and a disengaged position;
a first pump damper interconnecting the pump lock-up clutch and the input hub;
a turbine damper interconnecting the turbine and the input hub; and
a turbine lock-up clutch selectively connecting the turbine and the input hub, and moveable between an engaged position and a disengaged position;
wherein the transmission is operable in a first mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the disengaged position, and in a second mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the engaged position, wherein the first mode of operation allows the turbine and the turbine damper to cooperate with the pump damper to dampen torsional vibration at the input hub at a first frequency, and wherein the second mode of operation prevents the turbine damper from damping torsional vibration between the turbine and the input hub, and allows only the first pump damper to dampen torsional vibration at the input hub at second frequency.

2. The transmission set forth in claim 1 wherein the pump lock-up clutch is operable to mechanically connect the pump and the input hub in torque communication when disposed in the engaged position, and wherein the pump lock-up clutch mechanically disconnects the pump and the input hub when disposed in the disengaged position.

3. The transmission set forth in claim 2 wherein the turbine lock-up clutch is operable to mechanically connect the turbine the input hub in torque communication when disposed in the engaged position, and wherein the turbine lock-up clutch mechanically disconnects the turbine from the input hub when disposed in the disengaged position.

4. The transmission set forth in claim 1 wherein the pump-lock-up clutch does not directly connect the pump and the turbine.

5. The transmission set forth in claim 1 further comprising an input shaft connected to the input hub.

6. The transmission set forth in claim 5 further comprising a gear train coupled to the input shaft.

7. The transmission set forth in claim 6 further comprising a second pump damper disposed in series with the first pump damper.

8. An automatic transmission for a vehicle, the automatic transmission comprising:
a torque converter including a pump and a turbine, and operable to provide a fluid coupling for communicating torque therebetween;
an input hub;
a pump lock-up clutch selectively connecting the pump and the input hub for directly communicating torque therebetween;
wherein the pump lock-up clutch is moveable between an engaged position and a disengaged position, wherein the pump lock-up clutch is operable to mechanically connect the pump and the input hub in torque communication when disposed in the engaged position, and wherein the pump lock-up clutch mechanically disconnects the pump and the input hub when disposed in the disengaged position
a first pump damper interconnecting the pump lock-up clutch and the input hub;
a turbine damper interconnecting the turbine and the input hub; and
a turbine lock-up clutch selectively connecting the turbine and the input hub;
wherein the turbine lock-up clutch is moveable between an engaged position and a disengaged position, wherein the turbine lock-up clutch is operable to mechanically connect the turbine and the input hub in torque communication when disposed in the engaged position, and wherein the turbine lock-up clutch mechanically disconnects the turbine from the input hub when disposed in the disengaged position; and
wherein the automatic transmission is operable in a first mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the disengaged position, and in a second mode with the pump lock-up clutch disposed in the engaged position and the turbine lock-up clutch disposed in the engaged position, wherein the first mode of operation allows the turbine and the turbine damper to cooperate with the pump damper to dampen torsional vibration at the input hub at a first frequency, and wherein the second mode of operation prevents the turbine damper from damping torsional vibration between the turbine and the input hub, and allows only the first pump damper to dampen torsional vibration at the input hub at a second frequency.

9. The automatic transmission set forth in claim 8 wherein the pump-lock-up clutch does not directly connect the pump and the turbine.

10. The automatic transmission set forth in claim 8 wherein the pump is connected to the input hub through the pump lock-up clutch and the pump damper.

11. The automatic transmission set forth in claim 8 further comprising an input shaft connected to the input hub.

12. The automatic transmission set forth in claim 11 further comprising a gear train coupled to the input shaft.

13. The automatic transmission set forth in claim 12 further comprising a second pump damper disposed in series with the first pump damper.

Assignees

• Gm Global Tech Operations Llc

Inventors

• Li Dongxu
• Roses Victor M

Classifications

• F16H2045/0247

  having a turbine with hydrodynamic damping means · CPC title

• F16H2045/007

  comprising a damper between turbine of the fluid gearing and the mechanical gearing unit · CPC title

• F16H45/02 Primary

  with mechanical clutches for bridging a fluid gearing of the hydrokinetic type (control of torque converter lock-up clutches F16H61/14) · CPC title

• F16H2045/005

  comprising a clutch between fluid gearing and the mechanical gearing unit · CPC title

• F16H2045/0221

  with damping means · CPC title